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Finding the Fourth Proportional to 18,791.97, 28,163.47 and 10,471.65

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Solution

The fourth proportional to 18,791.97, 28,163.47 and 10,471.65 is: 15,693.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,791.97 : 28,163.47 = 10,471.65 : x
  2. Step 2: Convert to fraction form
    18,791.97/28,163.47 = 10,471.65/x
  3. Step 3: Cross multiply
    18,791.97x = 28,163.47 × 10,471.65
  4. Step 4: Simplify right side
    18,791.97x = 294,918,000.63
  5. Step 5: Solve for x
    x = 294,918,000.63/18,791.97
  6. Step 6: Final answer
    x = 15,693.83

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.